Abrasion testing machine



Aug. 22, 1950 R. L. FISH ABRASION TESTING momma Filed June 5, 1948 FIG.

\NVENTOR ROBERT L. FISH, y

die- M TTORNEY 7 FIG. 4.

FIG.3.

Patented Aug. 22, 1950 umrsc srmss ()FFlCE 2 Claims.

This machine relates to a testingmachine and particularly to a machine of the said character wherewith fabrics ofvarious types are ubjected to an abrasive action to determine their wearresisting quality. v I

An object of thisinvention is to provide an abrading machine wherein the fabric to be testedis adjustably held upona raclr and a series of abradantwhipping elements are rotated to in termittently strike and lash the said fabric to determine its wearing quality.

A further object of this invention is the pro-- vision therein of means for cooling the fabric while itis being tested.

Another object of this invention is the prevision therein of amultiplicity of rotatably mounted abradantmembers upon each of which dissimilar types of abrasive material may be secured to subject a fabric to a combination of abrasive impacts- I, I t

A further object of this invention is the provision therein or means for mounting a fabric to be tested in such to present a cor"- her or sharp turned-over portion Of same to a flaying, contacting action of rotating members carrying abrasive coverings. I

A still further object of this intention is the inclusion therein of means for adjustably holding a fabric to be tested upon the machine so that the angle of the said fabric with respect to the flaying arms may be set to receive a sliding contact over the flat faceoftiie fabric.

A still further object of this invention is the means provided therei nfor ac'cutately aligning and centering the rotating members with the fabrics to be tested.

Another object of this invention is the creation, by the rotary fanning motion of the abrasive members, of a centrifugal air movement which will blow the worn off particles free of the abrasive members and from the fabric being tested.

A still further object of this invention is the provision of a device in which the constituent elements are so arranged structurally and functionally as to assure improved results with materials and members which may be manufactured at reasonable cost, may be easily assembled and which will be efiicient in operation with minimum wear to the parts.

The invention possesses other objects and features of advantage, some of which, with the foregoing will be set forth in the following d scription and in the claims wherein parts will be identified by specific names for convenience but they are intended to be as generic in their apgarded as typical only of many possible embodi merits, and the invention is not to be limited thereto. I

The novel features considered characteristic of my invention; are set forth with particularit in the appended claims. The invention itself, how

ever, both as to its organization and its method of operation, together with additional objects and advantages thereof; will best be understood from the following description of a specific em'-' bodiment when read in connection with the ac companying drawings, inwhich:

Fig. I- is a plan view of the testing machine with its connected motor and shows portions broken away.

2 is a side elevat'idnal View of same having parts broken away.

Fig.- 3 is an enlarged fragmentary sectional viw' tals'e'fi approximately along line 3 -3 of Fig. 4; Fig: 3 shci emerges ragmentary side view of v the full width oftl'ie illiis tr'ated and 1s arry brok i'i s; is enraged fragmentary view', i5artl y section, area hen-g the use s s atntmar framework, comprising from and rea tubular rings 12 and lt'respectively con-n ctd by means or cros tubes M. in the embed n1:

Referring to the drawing, if desi t s" shows th'fe sash eresstubes s are indicated,

49 ing water or any suitable cooling fluid is fed to the rear ring l3 by means of an inlet pipe is and passes from the said rear tubular ring l3 through the cross tubes I4, into the front tubular ring I?! and discharged therefrom through an outlet pipe 20.

To the cross tubes I i, radially aligned with said front and rear tubular rings i2 and I3, there are secured, by means of clamping collars 2i and bolts 22 (Fig. 5), pla es 23, around which a fabric 24 is held, The said fabric is held upon said plates 23 by means of clamping plate 25 and 28 which are held together by bolts 2?. It will be noted that the fabric 24 is wound over and around the cross tubes is to present that J portion of the fabric for contact with rotating abrasive elements which wil now be described.

A hub-like member 28 having an extending shoulder portion 29 is arranged centrally between and concentrically with the said front and rear tubular rings I2 and I 3 and is carried upon one end of a shaft 30 which is in turn rotatably mounted within pillow blocks 3|. The said pillow blocks 3| are secured to the upper flanges 32 and 33 of channels 34 and 35 respectively by means of bolts 36 and 31 and the channels 34 and 35 are adjustably secured to the aforesaid base plate l by means of bolts 38 and 39 respectively. Filler blocks 40 and 4| may be provided to bring the axis of the shaft 30 to a point concentric with the tubular rings l2 and I3.

The said hub member 28 is keyed at 42, upon the shaft 30 and, in the case of the embodiment shown, is formed with three projecting slotted lugs 43 within which are held spring metal plates 44 the ends of which are brought together and held within the slots 45 of the projecting lugs 43. Over and around each of the said spring metal plates 44 there is held a sheet of abrasive material 46, such as emery cloth or like substance, which with the ends of said spring metal plates are securely held within the said slots 45 by means of bolts 41. The said hub member 23 is given clock like rotation by means of a sheave 48 and V-belt 49 which connects the said sheave 48 with a sheave 50 upon a motor 5|. The motor 5! may be mounted upon a table or base plate 52 and has upon the outer end of its shaft 53 a cam 54 which trips a trigger 55 of a counter 59 thereby registering the revolutions of the motor shaft 53 when the motor is turning.

The aforesaid spring arms 44 carrying the abrasive substance 46 extend radially from the hub 28 to a point beyond the aforesaid cross tubes l4 so that when rotated they will strike against said fabrics 24 upon said cross tubes and brush by same as they rotate. The abrasive carrying members being flexible, will give against the resistance of the fixed fabric and the pressure exerted by the spring member at each contact will wear off a portion of the fabric, and the continued, successive contact of the revolving abrasive members with the fixed fabrics will constantly wear down the fabric until same is destroyed and a record of the durability of wear of the fabric may be established.

In using the device of the embodiment shown, namely with three fabric holding units and three abrasive units, a fabric differing in texture may be fixed in each of the fabric holders or abrasive substances of differing coarseness may be mounted upon the spring metal carrying members.

The fabric holding members are all set (in the illustration) extending in radial alignment with the tubular ring thereby presenting a sharply turned edge to the abrasive action. However, by resetting the fabric holding member at a point approximately at right angles to the position shown or tangentially with the circumference of the tubular rings, the entire flat surface of the fabric being tested may be brushed by the ro-.

tating abrasive material.

Any combination of rotating abrasive units and fixed fabric holding units may be employed but the most eflicient and preferred embodiment is as shown in the drawings.

The constant flow of a cooling fluid through the tubular framework and cross tubes of the machine will prevent undue heating of the fabric.

I claim:

1. In an abrasive fabric testing machine, an open frame mounted upon a base and comprising a pair of spaced circular tubular members arranged in a vertical plane, cross tubes connecting said spaced circular tubular members, means for clamping a fabric upon the said cross tubes, a shaft rotatably mounted in bearings upon the base and having one end of same extending between the spaced tubular members, concentric therewith, a hub upon the extending shaft end between the spaced tubular members and adapted to rotate therebetween, flexible arms radially mounted upon the said hub, abrasive substance fixed upon said flexible arms and adapted, when rotated by said shaft, to contact and brush against the said fabric, a pulley upon said shaft and a motor connected by a drive belt to said pulley to rotate said shaft and its connected spring arms and abrasive elements thereon.

2. In an abrasive fabric testing machine as defined in claim 1, including a means for circulating a cooling fluid through the tubular sections to absorb the heat created by the rubbing contact of the abrasive material against the fabric.

ROBERT L. FISH.

REFERENCES CITED The following references are of record in th file of this patent:

UNITED STATES PATENTS Number Name Date 2,079,591 Bartell May 11, 1937 2,405,328 Robinson Aug. 6, 1946 2,452,409 Wickman Oct. 26, 1948 2,465,225 Haren Mar. 22, 1949 

